Cake-dough mixer.



No. 636,559. Patented Nov. 7,1899. R. ROBINSON.

CAKE DOUGH MIXER.

(Applcatiun led Aug'. 12, 1897. Renewed Sept. 26, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICEo RICHARD ROBINSON, on RILoxLMIssIssIPPI.

CAKEDOUGH..|VIIXER.

SPECIFICATION forming part of Letters Patent No. 636,559, dated November 7, 1899.v Application filed A ugust 12, 1897. Renewed September 26., 1899. Serial No. 731,769. (No model.)

.To all whom it may concern:

Be it known that 1, RICHARD ROBINSON, residing at Biloxi, 'in the county ofHarrison and State of Mississippi, have invented certain new and useful Improvements in Cake-Dough Mixers, of which the following is a specication.

My invention relates to cake-dou gh mixers;

and it seeks to provide a mixing device of this character of a very simple and economical concifically pointed out in the appended claims,'

reference being had to the accompanying drawings, in' which- Figure 1 is a vertical section of a mixingpan with my improvements applied. Fig. 2 is a top plan view of the same. Fig. 3 is a detail view illustrating the manner in which the paddle or beater frames are secured to the drive-gear. Fig. 4 is a detail View of one of the whooping-paddles or whirl-frames. Fig. 5 is a view illustrating one of the adjusting devices whereby the bridge-piece can be fitted to different-sized pans, and Fig. 6 is a detail section of one of the drive-gears.

Referring to the accompanying drawings, in which like numerals indicate like parts in all the figures, 1 indicates the pan, which may be of the Ordinary form and which has secured centrally on the bottom a socket-bearing 2 for the lower end of the operating-shaft 3, the upper end of which is supported in the arched portion 4a of a bridge-bar 4, which in practice is made of a length sufcient to extend over a large-sized pan, and to provide for holding it secured to the large or smaller sized pans a pair of clamp-ngers 5, one for each end of the bridge-piece, is provided, which are held pendent from and are longitudinally adjustable on the said bridge-piece, they, having shanks 5, which extend up through longitudinal slots 6 in the bridgepiece, as clearly shown in Fig. 5, by reference to which and Fig. 1 it will be seen that the clamp 5 has a pendent member 5", spaced apart from the clamp-finger, so as to extend down on the inside of the rim of the pan, such member having a threaded aperture to re-4 ceive the clamp-screw 7.

In tting my mixing devices to a pan the clam p-iin gers are adj usted to engage theouter or rim edge of the pan and held in tight contact therewith by the clamp-screws, as shown.

The upper face of one end of the bridgepiece' has bearings for a crank-shaft 8, the inner end of which has a bevel-cog 8, which meshes with a bevel-gear 9, ixedly secured to shaft 3, and with a bevel-gear 10, loosely held on such shaft, it being obvious that such construction provides for a reverse rotation of the gears 9 and 10. The gear 10 has a pendent hub provided with a series of radial slots 10:L at the lower end, which terminate at the top in sockets 10".

12 indicates a collar held loosely and vertically adjustable on the shaft 3, which has radial slots 12a in the upper end, which terminate at the bottom in sockets 12b.

13 13a indicate collars vertically movable on the shaft 3, but held to turn therewith by the clamp-screws. These collars are also provided with radial slots and sockets similar to those in the collars 12 and hub of gear 10.

15 indicates a clamp-collar held on the shaft below the loose collar 12, it, together with the collar 13a, holding the collar 12 to its vertically-set position.

16 indicates the outer and 17 the inner set of whirling frames, the outer ones being secured to the hub of gear l0 and loose collar 12 and the inner set to the fast collars 13 13a. Each frame 16'or 17 consists of a stout springwire bent to form a cone-section, the upper and lower ends being, however, bent in horizontally and terminating in vertical portions 20, which are adapted to fit the radial slots Vin the collars to which they are attached, it being understood that by compressing the horizontal ends of the frames the portions 2O can be sprung upinto the sockets in the collars, as clearly shown in the drawings.

IOO

By providing collars and frames constructed in the manner described a simple, convenient, and effective means for securing the frames to the drive-gearing is provided. Furthermore, by providing collars having a vertical adjustment on the shaft they can be setto provide a tight attachment for the frame in case the tension of such frame becomes weakened by use.

Each of the whirl-frames carries at the bottom a paddle 21, of Wood, which run near each other and as they rotate in reverse directions produce a slapping action on the dough and in consequence give it a successive turning action or whoop,and thereby ix it in a very short time.

In use the operator turns the handle, which through the medium of the reversely-rotating gearing rotates the whirl-frames and paddles quickly, but in reverse directions.

The several part-s are so constructed and arranged that they can be readily assembled and detached, the whole forming a very useful kitchen appliance.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In -a mixing-machine, the combination with the pan, the bridge-piece and the vertical shaft journaled in the pan and bridgepiece, said shaft having aloose and fixed gear, and a loose and fixed collar, and the crankshaft and gear for operating the said fixed and loose gears, of whirling frames each consisting of a spring-body having horizontal members at the top and bottom, having look ends to engage the fast and loose collars and the iixed gear, and held locked by the spring expansion of such ends as specified.

2. In a mixing device as described, the coinbination with the operating-shaft, and drive means, of collars held on the shaft having radial slots and sockets, and whirling frames formed of aspring-Wire, bent substantiallyin a semiconical shape, havinghorizontal upper and lower members provided with angle iingers or extensions adapted to seat in the radial slots and have their ends engage the sockets in such collars, substantially as shown and for the purposes described.

RICHARD ROBINSON.

Witnesses:

LEVY Monats, A. DAVIS. 

